37
3. Connect the test leads to the instrument and to the tested instrument
in accordance with the figure 18.
4. Press the START/STOP key to start the measurement.
5. Wait for the set time to elapse (if the timer has been switched on)
or press the START/STOP key again to stop the measurement.
6. Save the displayed result for documentation purposes (refer to the
instructions in chapter 5.2 to save the displayed result).
NOTES :
■
■
■
■
■
The actual test voltage is displayed during the measurement and also
after finishing the measurement until the voltage drops to 60 V.
■
■
■
■
■
Do not disconnect the leads until the voltage present drops down to
60 V and do not touch the test terminals during that time.
4.5.
DISCHARGE TIME - 2 POLE SYSTEM
R
230 V/50 Hz
C
L
V
C.A 6121 MACHINE TESTER
OBJECT UNDER TEST
MAINS TEST
Fig.19. Test circuits
discharge time
60 V
t
expected
MAINS TEST
input voltage
d
is
c
o
n
n
e
c
tio
n
v
o
lta
g
e
ideal power disconnection
moment
power disconnection moment
Fig.20. Voltage on MAINS TEST input
How to perform the measurement ?
1. Set the rotary switch to
∆
t (discharge time) position; the following screen is displayed.
U:_ _ _ _ V
_ _ _ _ S
Syst.
2-point
1s
∆
t
Function name
Selected connection system
Present voltage
during the test or
disconnection
voltage after
finishing the test
Discharge time
(main result)
Syst. key to select
connection system
Fig.21. Basic screen in
∆
t position
L1
L2
L3
OFF
N
PE
U :
R:
I:
n
500 or 1000 V DC
0...
...500 M
1 mA nominal
0,008...200
W
600V 250V CAT III
1 - 1.25 - 1.5 kV
START / STOP
TEST ON
H
V
M
W
R
10A
D
t
D
U
ARNOUX
CHAUVIN
INSULATION (M )
W
500 - 1000 V
DISCHARGE TIME ( t)
D
CONTINUITY 12V/>10A
( U,R
)
D
10A
DIELECTRIC (HV)
Fig.18. Connection of the test leads
